AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK

Bibliographic Details
Main Author:	Garafolo, Nicholas Gordon
Language:	English
Published:	University of Akron / OhioLINK 2006
Subjects:	Traveling Wave Multiple Mode Excitation Engine Order Integrally Bladed Disk Bladed Disk Blisk IBR Modal Analysis Turbomachinery rotor ADLARF Force Response Forced Response Linear Superposition Theory High Cycle Fatigue
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=akron1164047919

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-akron11640479192021-08-03T05:24:58Z AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK Garafolo, Nicholas Gordon Traveling Wave Multiple Mode Excitation Engine Order Integrally Bladed Disk Bladed Disk Blisk IBR Modal Analysis Turbomachinery rotor ADLARF Force Response Forced Response Linear Superposition Theory High Cycle Fatigue High cycle fatigue of jet aircraft engine turbomachinery components is a serious problem for aircraft engine designers. State-of-the-art compressor designs have reduced mechanical damping and increased unsteady aerodynamic interaction between blade rows. New manufacturing techniques have enabled the rotor to be comprised of an integrally bladed disk, called a blisk. Advanced compressor designs have blades with low aspect ratios, highly complex geometry and higher tip speeds. Inherent in the single disk stage designs is a reduction in mechanical damping; no longer do the connections of blade to disk offer a viable source of damping. Thus, it is important to accurately portray the structural response of the component in a laboratory environment. In an engine environment, a blade row is simultaneously excited from a number of sources. This multiple mode environment was simulated by the modification of the Traveling Wave test rig at the Turbine Engine Fatigue Facility of the Air Force Research Laboratory. The objective of the research presented herein is to measure response of the ADLARF fan rotor excited in a multiple mode environment. The ADLARF fan is significantly structurally mistuned through the replacement of two opposing metallic blades with composite blades done in a past experiment. In this substantially mistuned environment, the assumption of the linear superposition theory for these multiple mode excitations was validated through spatial discrete Fast Fourier transforms and a data point superposition. It has been shown that the response of a bladed disk depends on the engine order of the excitation. Showing the necessity for matching the spatial mode order of the response with that of the engine order of the excitation has provided valuable insight towards fatiguing a complete bladed disk in a laboratory setting. 2006 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1164047919 http://rave.ohiolink.edu/etdc/view?acc_num=akron1164047919 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Traveling Wave Multiple Mode Excitation Engine Order Integrally Bladed Disk Bladed Disk Blisk IBR Modal Analysis Turbomachinery rotor ADLARF Force Response Forced Response Linear Superposition Theory High Cycle Fatigue
spellingShingle	Traveling Wave Multiple Mode Excitation Engine Order Integrally Bladed Disk Bladed Disk Blisk IBR Modal Analysis Turbomachinery rotor ADLARF Force Response Forced Response Linear Superposition Theory High Cycle Fatigue Garafolo, Nicholas Gordon AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK
author	Garafolo, Nicholas Gordon
author_facet	Garafolo, Nicholas Gordon
author_sort	Garafolo, Nicholas Gordon
title	AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK
title_short	AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK
title_full	AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK
title_fullStr	AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK
title_full_unstemmed	AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK
title_sort	experimental investigation of multiple mode excitation of an integrally bladed disk
publisher	University of Akron / OhioLINK
publishDate	2006
url	http://rave.ohiolink.edu/etdc/view?acc_num=akron1164047919
work_keys_str_mv	AT garafolonicholasgordon anexperimentalinvestigationofmultiplemodeexcitationofanintegrallybladeddisk AT garafolonicholasgordon experimentalinvestigationofmultiplemodeexcitationofanintegrallybladeddisk
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AN EXPERIMENTAL INVESTIGATION OF MULTIPLE MODE EXCITATION OF AN INTEGRALLY BLADED DISK

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